Subcontractor Working on Exploded Boston-area Pipes Identified

We continue to track the story we first brought you on Monday of this week, that late last week there was a chain-reaction of explosions in local natural gas delivery pipelines about 25 miles north of Boston (see Local NatGas Pipes Explode Near Boston Killing 1, Injuring 25). The explosions and resulting fires tragically killed one teenager and injured 25 others. Local officials ordered some 8,600 residents and businesses in the three communities to evacuate–until Sunday. A major incident. The ramifications of this situation will go on for years. Although it’s still early in the investigation process, the cause of the explosions appears to be a combination of old/decaying pipes with too much pressure flowing through them. According to an NTSB spokesman, the early indicators are that a pressure sensor is the cause (see Pressure in Exploded Massachusetts Pipes 12X More than Normal). Here’s what *may have* happened: A pressure sensor that controls how much gas is pumped through local pipelines was attached to a portion of a pipeline that was capped at both ends and closed off. The sensor detected little-to-no pressure, so it signaled the system to keep increasing the pressure, to flow more gas. The pressure eventually reached 12 times what it should have been, and the older cast iron and steel pipelines couldn’t take it, resulting in explosions and fires. The question turns to who capped off the pipeline with the sensors? Who was working on pipelines in that community on that day? A Boston TV station tracked down the who…